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Monthly climate in Atwater, California, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Atwater features a cold semi-arid climate (BSk).Temperatures typically range between 10 °C (50 °F) and 30 °C (86 °F) through the year, but rarely can drop to -2 °C (28 °F) or can rise to as high as 45 °C (114 °F).The average annual precipitation amounts to about 440 mm (17.3 inches) and receives 45 rainy days on the 1 mm (0.04 inches) threshold annually.Atwater enjoys an average of 3523 hours of sunshine throughout the year, and daylight varies from 9 hours 37 minutes to 14 hours 40 minutes per day.

Monthly average temperatures in Atwater, California, United States §

The warmest months in Atwater are June, July and August, with daily mean temperatures ranging from 27 to 30 °C (81 - 86 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 10 to 12 °C (50 - 53 °F) throughout the day. On average each year, Atwater experiences 170 days above 25 °C (77.0 °F) and 1 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Atwater, California, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 24°C
(76°F)		 28°C
(83°F)		 32°C
(89°F)		 35°C
(96°F)		 42°C
(109°F)		 44°C
(112°F)		 44°C
(111°F)		 44°C
(112°F)		 45°C
(114°F)		 37°C
(98°F)		 28°C
(82°F)		 23°C
(73°F)
Mean maximum 20°C
(69°F)		 24°C
(75°F)		 28°C
(83°F)		 33°C
(92°F)		 38°C
(100°F)		 40°C
(105°F)		 42°C
(108°F)		 42°C
(108°F)		 41°C
(107°F)		 33°C
(93°F)		 26°C
(79°F)		 20°C
(69°F)
Average high 16°C
(60°F)		 18°C
(65°F)		 20°C
(69°F)		 25°C
(78°F)		 30°C
(86°F)		 35°C
(95°F)		 38°C
(101°F)		 37°C
(100°F)		 34°C
(93°F)		 28°C
(82°F)		 21°C
(70°F)		 15°C
(60°F)
Daily mean 10°C
(51°F)		 12°C
(53°F)		 14°C
(57°F)		 18°C
(65°F)		 22°C
(72°F)		 27°C
(81°F)		 30°C
(86°F)		 29°C
(84°F)		 26°C
(78°F)		 19°C
(67°F)		 14°C
(57°F)		 10°C
(50°F)
Average low 6°C
(43°F)		 6°C
(43°F)		 8°C
(47°F)		 12°C
(53°F)		 15°C
(59°F)		 19°C
(67°F)		 22°C
(71°F)		 21°C
(71°F)		 18°C
(65°F)		 12°C
(54°F)		 8°C
(47°F)		 6°C
(42°F)
Mean minimum 1°C
(33°F)		 -0°C
(32°F)		 3°C
(37°F)		 6°C
(43°F)		 10°C
(50°F)		 14°C
(57°F)		 18°C
(65°F)		 17°C
(63°F)		 12°C
(55°F)		 7°C
(44°F)		 3°C
(37°F)		 0°C
(33°F)
Minimum -2°C
(29°F)		 -2°C
(29°F)		 2°C
(36°F)		 5°C
(42°F)		 8°C
(46°F)		 12°C
(54°F)		 17°C
(62°F)		 16°C
(61°F)		 11°C
(51°F)		 5°C
(41°F)		 1°C
(35°F)		 -2°C
(28°F)

Compare climate in Atwater with other places

Compare temperature, precipitation, sunshine, UV index in Atwater, California, United States with other places around the world.

Monthly average precipitation in Atwater, California, United States §

Atwater usually has the most precipitation in January, March and December, with an average of 8 rainy days and 89 mm (3.5 inches) of precipitation per month.The driest months in Atwater are July, August and September. On average, 0 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Atwater, California, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 96 (3.8) 73 (2.9) 89 (3.5) 28 (1.1) 23 (0.9) 1 (0.0) 0 (0.0) 0 (0.0) 0 (0.0) 17 (0.7) 31 (1.2) 83 (3.3)
Average precipitation days (≥ 1 mm) 7 8 10 4 3 0 0 0 0 1 4 8

Monthly sunshine hours in Atwater, California, United States §

The sunniest months in Atwater are May, June and July, when the sun shines an average of 12 hours 25 minutes a day.Least sunny months in Atwater: January, February and December receive an average of 6 hours 35 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Atwater, California, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 166 221 264 310 366 383 391 361 316 290 238 211
Mean daily daylight hours 9h 54m 10h 49m 11h 59m 13h 11m 14h 11m 14h 40m 14h 24m 13h 30m 12h 21m 11h 10m 10h 8m 9h 37m

Solar UV radiation in Atwater, California, United States §

Atwater experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme category of sun exposure.January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 4. For more detailed information, check out our hourly Atwater UV Index data.

Average daily maximum UV levels by month for Atwater, California, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 3 5 8 9 10 11 11 10 9 7 4 3